Obsidian Security vs SentinelOne
Side-by-side comparison of AI visibility scores, market position, and capabilities
SaaS security platform for behavioral threat detection and identity risk management across enterprise SaaS applications. Newport Beach CA; raised $90M+;
About
Obsidian Security is a SaaS security and identity threat detection company founded in 2017 and headquartered in Newport Beach, California. The company was founded by former executives and engineers from Carbon Black, CrowdStrike, and the NSA who applied endpoint detection and response principles to the SaaS domain. Obsidian's platform monitors user behavior across SaaS applications to detect account compromise, insider threats, and data exfiltration by analyzing activity patterns — logins, API calls, data access, sharing events — against behavioral baselines built for each user.\n\nObsidian raised $90 million across three rounds from investors including Norwest Venture Partners, IVP, and Greylock Partners. Its platform integrates with major enterprise SaaS applications including Salesforce, Microsoft 365, Google Workspace, ServiceNow, GitHub, Workday, and more than 40 other applications. Rather than relying solely on configuration checks, Obsidian focuses on runtime behavioral analytics: detecting when a compromised account is performing unusual data exports, when a user accesses records far outside their normal work patterns, or when a service account begins making API calls it has never made before.\n\nThe platform also covers SaaS identity risk management, inventorying privileged accounts, dormant accounts, and over-permissioned users across all integrated applications. Security teams can use Obsidian to reduce their SaaS attack surface by identifying and remediating excessive access, and to respond to active threats with detailed activity timelines that provide forensic evidence for incident investigations. Obsidian's combination of posture management and behavioral detection positions it between pure SSPM tools and identity threat detection and response (ITDR) platforms.
AI-powered endpoint security with $800M revenue; autonomous threat response and rollback on the Singularity Platform competing with CrowdStrike after CrowdStrike's 2024 global outage.
About
SentinelOne is a cybersecurity company providing AI-powered endpoint detection and response (EDR), extended detection and response (XDR), cloud security, and identity security through its Singularity Platform — using machine learning to detect and autonomously respond to malware, ransomware, and advanced threats in real time without requiring human intervention. Listed on NYSE (NYSE: S) and headquartered in Mountain View, California, SentinelOne generates approximately $800 million in annual revenue and competes with CrowdStrike for the enterprise endpoint security market.\n\nSentinelOne's Singularity Platform differentiates through autonomous response capability — when a threat is detected, the platform can automatically isolate infected machines, terminate malicious processes, roll back files to pre-attack states, and remediate damage without requiring a security analyst to approve each action. This "autonomous" response model reduces the threat dwell time and damage from fast-moving ransomware attacks that can encrypt thousands of files in minutes. The cloud-native architecture uses the Singularity Data Lake to correlate telemetry across endpoints, cloud workloads, and identities for unified threat detection.\n\nIn 2025, SentinelOne competes primarily with CrowdStrike Falcon for enterprise EDR/XDR market share — the two companies have become the dominant modern endpoint security vendors, having displaced legacy antivirus from McAfee and Symantec. The July 2024 CrowdStrike Falcon content update outage (which caused millions of Windows machines to crash) created a significant opportunity for SentinelOne, which accelerated customer acquisition in the months following. SentinelOne's 2025 strategy focuses on growing Purple AI (its generative AI security analyst that provides natural language threat investigation), expanding cloud workload protection, and growing identity security through its Singularity Identity product.
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